BSWN-12/D & BAWN-12/D

These are handwheel operated O-ring seal design valves with two-piece stem construction in CGA 520 & CGA 200 outlet respectively. The free-floating upper stem & the threaded lower stem interface through a square drive to open & close the valve. The design uses O-ring to create a seal around the upper stem. PEEK thrust washer is capsuled with the upper stem & acts as anti-friction ring when the upper stem rotates to operate the valve under pressure. Leakage through the packing nut thread is protected by metallic sealing with secondary protection provided by an O-ring below the packing nut thread. Lower stem has PVDF soft seat for easy shut off.